[Solr Wiki] Update of "FAQ" by HossMan

[Apache Wiki <wi...@apache.org>]

Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Solr Wiki" for change notification.

The following page has been changed by HossMan:
http://wiki.apache.org/solr/FAQ

------------------------------------------------------------------------------
- This is the Official Solr FAQ.
+ This is the Official Solr FAQ.  There is also a [:SolrRelevancyFAQ:Relevancy FAQ] for addressing questions specific to how Relevancy Scoring works in Solr.
  
  [[TableOfContents]]
  
@@ -177, +177 @@

  
  Solr's uses [http://lucene.apache.org/ Lucene] for ranking.  A detailed summary of the ranking calculation can be obtained by adding [http://wiki.apache.org/solr/CommonQueryParameters#head-f45a9396425956a4db8d6478ed6029adfb7b0858 `debugQuery=true`] to the query parameter list.  The output takes some getting used to if you are not familiar with Lucene's ranking model.
  
+ The SolrRelevancyFAQ has more information on understanding why documents rank the way they do.
+ 
+ == Why Isn't Sorting Working on my Text Fields? ==
+ 
+ Lucene Sorting requires that the field you want to sort on be indexed, but it cannot contain more then one "token" per document.  Most Analyzers used on Text fields result in more then one token, so the simplest thing to do is to use copyField to index a second version of your field using the !StrField class.
+ 
+ If you need to do some processing on the field value using !TokenFilters, you can also use the !KeywordTokenizer, see the Solr example schema for more information.
+ 
  = Performance =
  
  == How fast is indexing? ==